Why isn't that image showing up? The XML looks fine.

If you're wracking your brain trying to figure out why that ImageView isn't displaying the drawable (and you know the drawable's there), make sure and check that you have specified the namespace prefix for the "src" attribute.

Android will silently ignore an attribute like src="@drawable/image_I_know_exists", when you really need to be specifying android:src="@drawable/image_I_know_exists", assuming you've got something like this defined previously in your XML: xmlns:android="http://schemas.android.com/apk/res/android"

To recap:Image will NOT show (but no error messages or anything):
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
src="@drawable/image_I_know_exists"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>

The purpose of this page is to summarize in one place some of the interactive visualizations I have worked on. Most of these were built...

"When you start on your journey to Ithaca, then pray that the road is long, full of adventure, full of knowledge... Always keep Ithaca fixed in your mind. To arrive there is your ultimate goal. But do not hurry the voyage at all." (from "Ithaca", by C. P. Cavafy)